package com.artqiyi.dollmachine.utils;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * Created by Administrator on 2017/11/9 0009.
 */

public class MD5Utils {
    /**
     * 7      * 使用md5的算法进行加密
     * 8
     */
    public static String md5(String plainText) {
        byte[] secretBytes = null;
        try {
            secretBytes = MessageDigest.getInstance("MD5").digest(
                    plainText.getBytes());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("没有md5这个算法！");
        }
        String md5code = new BigInteger(1, secretBytes).toString(16);// 16进制数字
        // 如果生成数字未满32位，需要前面补0
        return fillMD5(md5code);
    }

    public static String fillMD5(String str) {
        return str.length() == 32? str:fillMD5("0" + str);
    }
}
